joins us live with more now. >> michelle obama will be taking center stage and campaign officials say she'll be a character witness for the president's decision making. >> she's considered the president's closer. and democrats hope tonight the first lady can deliver a winning sales pitch. mrs. obama is popular with a favoribility rating of nearly 70%. her husband, 50%. her prime time appearance provides an opportunity to reach out to the disappointed obama voters the one who's believe he hasn't fulfilled his promise of hope and change. >> the fact someone is likeable as michelle obama says barack obama is a good guy? that work autos it's a chance to appeal to women voters considered to be a key to victory in november. >> whatever i say here today, it's going to be at best a disstant second to the speech you will hear tonight from the star of the obama family, michelle obama. >> campaign aides say the first lady will speak about her husband's values and judgment and a personal way of doing it no politician or political advisor can. >> barack is the level headedness you see is real. >>